Abstract: Zhejiang Petrochemical & Chemical Co., Ltd. has optimized and adjusted the processing flow of catalytic cracking gasoline and naphtha. By utilizing existing equipment to flexibly adjust and optimize feedstock processing, the insufficient hydrogenation capacity of straight-run naphtha has been resolved, and the amount of reformer feedstock has been increased, significantly improving the flexibility of gasoline and aromatics production. Partial modifications were made to the pretreatment, light gasoline etherification, and S Zorb units, with the original gasoline distillation tower in the pretreatment unit replaced by a dividing wall column. The use of dividing wall column technology for the ternary separation of catalytic cracking gasoline allows the original tower top condensing system and bottom reboiler to be reused without modification, reducing the separation energy consumption by about 30% compared to conventional two-tower separation schemes. Through the optimization and adjustment of catalytic cracking gasoline refining and naphtha processing, the issue of high benzene content in gasoline making it difficult to reduce production has been resolved. When it is necessary to reduce gasoline production, finished gasoline can be reduced by about 38%, enhancing the hydrogenation capacity of naphtha and the flexibility of the entire plant production.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">catalytic cracking gasoline, dividing wall column, heavy naphtha, slurry bed hydrotreating unit, first-stage naphtha of atmospheric distillation unit, reforming feedstock, benzene content in gasoline

摘要： 介绍了浙江石油化工有限公司对催化裂化汽油、石脑油加工流程的优化调整过程及效果。优化调整过程：利用已有装置灵活调整优化原料加工，解决了直馏石脑油加氢能力不足的问题，并增加了重整装置原料量，汽油与芳烃生产灵活性得以大幅度提高。对预处理、轻汽油醚化和S Zorb装置进行局部改造，预处理单元中原汽油分馏塔更换为隔墙塔。利用隔墙塔技术对催化裂化汽油进行三组分分离，原塔顶冷凝系统及塔底重沸炉利旧无需改造，使分离能耗比常规两塔分离方案降低约30%。通过对催化裂化汽油精制和石脑油加工流程的优化调整，解决汽油苯含量高导致汽油难以减产的问题，当需要减产汽油时，成品汽油可减产约38%，提高了石脑油加氢处理能力及全厂生产灵活性。

关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">催化裂化汽油, 隔墙塔, 重石脑油, 浆态床加氢装置, 常压塔顶一级石脑油, 重整原料, 汽油苯含量